1061531 has 8 divisors (see below), whose sum is σ = 1152144. Its totient is φ = 974080.

The previous prime is 1061527. The next prime is 1061561. The reversal of 1061531 is 1351601.

1061531 = T₁₇₈ + T₁₇₉ + ... + T₂₂₈.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1061531 - 2² = 1061527 is a prime.

It is a super-2 number, since 2×1061531² = 2253696127922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1061561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65 + ... + 1458.

It is an arithmetic number, because the mean of its divisors is an integer number (144018).

2^1061531 is an apocalyptic number.

1061531 is a deficient number, since it is larger than the sum of its proper divisors (90613).

1061531 is a wasteful number, since it uses less digits than its factorization.

1061531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1581.

The product of its (nonzero) digits is 90, while the sum is 17.

The square root of 1061531 is about 1030.3062651464. The cubic root of 1061531 is about 102.0103475341.

It can be divided in two parts, 1061 and 531, that multiplied together give a triangular number (563391 = T₁₀₆₁).

The spelling of 1061531 in words is "one million, sixty-one thousand, five hundred thirty-one".